“The world of the Hollows is fast-moving, funny, harrowing and scary, and—the greatest compliment to a fantasy—absolutely real.”
—Diana Gabaldon

Welcome to the Hollows—Kim Harrison’s remarkable shadow world of vampires, pixies, demons…and one unstoppable bounty hunter witch named Rachel Morgan. The Hollows Insider is your guide through the dark mysteries of this grimly twisted Cincinnati—featuring maps and illustrations, spells and character profiles, and much more, including an all-new Rachel Morgan short story. Fans of New York Times bestseller Harrison will not want to miss The Hollows Insider, a visitor’s handbook to this creepy capital of the urban fantasy universe—on the same alternate globe, perhaps, as Charlaine Harris’s vampire-ridden Louisiana, Jim Butcher’s sinister Chicago, and Patricia Brigg’s shape-shifting Pacific Northwest.

I haven't given this series a shot yet even though I've heard many good things about it and the author hmm. Is it better then her YA series because One Dead, Twice Shy is the only thing I've read by her and it was just ok to me.